#include <stdio.h> #include<math.h> main() { int x,a,b,c,e; printf("在键盘上任意输入一个三位数x:\n"); scanf("%d",&x); x=abs(x); a=x/100; b=(x-a*100)/10; c=x% 10; e=c*100+b*10+a; printf("这个三位数的逆序数为:%d\n",e); }